Law

A man was about to open his house door.

Man : "Oh no! I've forgotten my keys!

Thank goodness a locksmith had pasted his ad on my meter box."

Later...

Locksmith : "There, I've unlocked your door. That'll be $50."

Man : "You mean it's free of charge or I'll report you to the authorities for vandalising public property with your stickers..."

Legal Question : Should the man pay the locksmith and should the locksmith charged with vandalism ?

>>1
Either pay the money, or offer another method of payment. He did a service that the locked could have done himself. As an added bonus, the locksmith could remove the ad, and blacklist his number and address, and everyone live happily ever after.